I installed the YT module Pro about 5 days ago and it worked fine.
Yesterday I noticed there is now no site access ( just hangs with 504 Gateway timeout )
When I disabled the 2 x YT modules I set up, the site immediately springs to life.
I have tried 2 different API keys but that did not work.
I am using version 4.5.8 Joomla 3.9.16 and PHP 7.3

Can you help please ?  thanks